C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LT1/LT4 water pump drain?

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Old Apr 16, 2005 | 08:43 AM
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Default LT1/LT4 water pump drain?

I don't know if anyone has tried this to remedy the problem of a leaking water pump onto the Opti. Why not put a small plastic hose in to the drain hole to redirect the leaking coolant away from the Opti?
Give your input on this, please.

Thanks,
JTHVETTE
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Old Apr 16, 2005 | 09:27 AM
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Default Wondering as well

My water pump also leaks a small amount of fluid, not even enough for me to have to fill the reservoir tank since I bought the car in February. The car never gets hot (even in way South Texas) and the fans kick on when they are supposed to.

I have been told to replace the pump, even though it functions properly. Is this a common occurrence in the LT1/LT4's?

Kenny
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Old Apr 16, 2005 | 10:14 AM
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Same situation here - 92 LT1, 43k, slight leak.

When I change should I do the opti as well ?
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Old Apr 16, 2005 | 10:53 AM
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When the pump starts leaking, it's usually a sign of a problem. Here's a pic of the back of my second stock pump. Neither lasted 50,000 miles.
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Old Apr 16, 2005 | 11:07 AM
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The "weep hole" on the water pump allows any coolant getting out past the seals to keep from causing corrosion on the aluminum housing. Once you see coolant coming out, it typically means that the seals will fail at some point.

Water in the Opti is usually a fatal condition so making sure the water pump is not leaking is good for Opti survival. If you catch any leakage from the pump quickly, you can save the cost of replacing the Opti.

IMHO, anything that puts off replacing a leaky water pump is only delaying the time when the water pump fails. Murphy's Law applies to LT1 water pumps too; it will fail at the most inopportune time and with the greatest amount of destrucion possible at the same time.
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Old Apr 16, 2005 | 11:14 AM
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yep, just replace it...
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Old Apr 16, 2005 | 11:44 AM
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Originally Posted by JTHVETTE
Why not put a small plastic hose in to the drain hole to redirect the leaking coolant away from the Opti?
Yes that's a good idea. I've seen it in a tech tip somewhere as well.
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